If 3'4 moles of O2 fills a balloon, what is the volume of the balloon

1
Using the Mole Map

• If 3.4 moles of O2 fills a balloon, what is the
  volume of the balloon?
• Identify the given.
• Identify the unknown.
• Go to the Mole Map to find the conversion factor.
• Set up dimensional analysis.

2
Using the Mole Map

• Given 3.4 moles of O2
• Unknown Volume of O2
• Conversion Factor
• 1 mole of O2 22.4 L of O2
• Dimensional Analysis

3
Solve

• A student uses 4.3 grams of NaCl. How many moles
  are being used?
• If 0.98 moles of magnesium sulfide are needed,
  how many grams of the substance should be
  weighed?
• How many atoms of Cu are in 13.4 grams of Cu?

4
A student uses 4.3 grams of NaCl. How many moles
are being used?

• Given 4.3 g NaCl
• Unknown Moles of NaCl
• Conversion Factor
• 1 mole of NaCl 58.44 g NaCl

0.0736 moles of NaCl
5
If 0.98 moles of magnesium sulfide are needed,
how many grams of the substance should be weighed?

• Given 0.98 moles of MgS
• Unknown Grams of MgS
• Conversion Factor
• 1 mole of MgS 56.36 grams of MgS

55.2 grams of MgS
6
How many atoms of Cu are in 13.4 grams of Cu?

• Given 13.4 grams of Cu
• Unknown Atoms of Cu
• Conversion Factors
• 1 mole of Cu 63.55 grams of Cu
• 1 mole of Cu 6.022 x 1023 atoms of Cu

1.27 x 1023 atoms of Cu
7
Solve

• A balloon of H2 gas weighs 1.2 grams. How many
  liters of gas are in the balloon?
• A liter of oxygen gas contains ________ oxygen
  molecules.
• If 3.4x1023 formula units of Al2O3 are available,
  how much will it weigh?

8
A balloon of H2 gas weighs 1.2 grams. How many
liters of gas are in the balloon?

• Given 1.2 grams of H2
• Unknown Volume of H2 (in Liters)
• Conversion Factors
• 1 mole of H2 2.016 grams of H2
• 1 mole of H2 22.4 L of H2

13.3 liters of H2
9
A liter of oxygen gas contains ________ oxygen
molecules.

• Given A (one) liter of O2
• Unknown Molecules of O2
• Conversion Factors
• 1 mole of O2 22.4 liters of O2
• 1 mole of O2 6.022 x 1023 molecules of O2

2.69 x 1022 molecules of O2
10
If 3.4x1023 formula units of Al2O3 are available,
how much will it weigh?

• Given 3.4 x 1023 formula units of Al2O3
• Unknown Mass of Al2O3
• Conversion Factors
• 1 mole of Al2O3 6.022 x 1023 formula units of
  Al2O3
• 1 mole of Al2O3 101.96 grams of Al2O3

57.6 grams of Al2O3
11
Identify the Conversion Factor

• If 4.3 grams of Co are needed, how many moles of
  Co should we gather?
• Krypton gas is needed to fill a light bulb that
  can hold 0.5 liters of gas. How many moles of
  krypton are needed?
• If gold (III) chloride weighs 345 g, how many
  formula units are present?

12
If 4.3 grams of Co are needed, how many moles of
Co should we gather?

• Identify the conversion factor
• 1 mole of Co 58.63 grams of Co

13
Krypton gas is needed to fill a light bulb that
can hold 0.5 liters of gas. How many moles of
krypton are needed?

• Identify the conversion factor
• 1 mole of Kr 22.4 liters of Kr

14
If gold (III) chloride weighs 345 g, how many
formula units are present?

• Identify the conversion factors
• 1 mole of AuCl3 303.3 grams AuCl3
• 1 mole of AuCl3 6.022 x 1023 formula units of
  AuCl3

15
Percent Composition

• Sodium bicarbonate (NaHCO3) is the compound found
  in baking soda and has many useful applications.
  Find the mass percentages of Na, H, C, and O
  found in sodium bicarbonate.

16
Composition of Sodium Bicarbonate

• Molar mass of NaHCO3 84.01 g

17
Percent Composition

• Calculate the percent composition of each element
  in acetic acid, CH3COOH.

18
Percent Composition of Acetic Acid, CH3COOH

• Molar mass of CH3COOH 60.05 g

19
Percent Composition

• Calculate the percent composition of the cation
  in each of the following compounds
• Copper (II) bromide
• Tin (II) oxide
• Silver nitrate
• Ammonium chloride

20
Percent Composition of the cation